Cleaning out sink drain

[Dmwesq]

I just replaced a faucet in a bathroom sink. The drain in the sink has either dirt or mold in it - hard to tell which - but so far it hasn't come off and just wondering what recommendations there are for cleaners that will help with this before I put the drain and trap back on.

 

[Reach4]

A bleach solution will get rid of mold and not dirt.

Testing for Mold in your Home | Tips and Checklists

Continue reading for some signs that you may be having a mold issue, tips on how to handle that issue, and some mold testing methods to determine the severity of the issue.

www.serveandrestore.com

Mold and mildew are often mistaken for dirt. If you begin to see small dark spots on mold-susceptible surfaces in your home, a quick at-home mold testing technique to see if it’s mold or if it’s just dirt is to pour a cup of bleach (an extremely small amount of bleach) and water (approximately 1 part bleach to 16 parts water). Next, take a q-tip, dip it into the solution, and lightly dab away at the spots. If the spot lightens quickly or disappears completely after a few light dabs, it is more than likely mold or mildew.

 

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[Christie Sternee]

Give the drain a good scrub with a brush, then pour in baking soda and vinegar. Let it sit a few minutes and flush with hot water—usually removes any mold or gunk before reinstalling the trap.

 

[Sylvan]

Give the drain a good scrub with a brush, then pour in baking soda and vinegar. Let it sit a few minutes and flush with hot water—usually removes any mold or gunk before reinstalling the trap.

How can they"Flush" with hot water before reinstalling the trap?